Paving-block.



H. E. WARDEN. PAVING'BLocK. APPLICATION -FILED APR- I7 1915.

UNITED. STATES PATENT OFFICE.

HARRY' E. WARDEN, OF DETROIT, MICHIGAN.

PAVING-BLOCK.

Specification of Letters Patent.

Application led April 17, 1915. Serial No.v 21,957.

ITo. all whom t may concern:

Be it known that I, HARRY E.' WARDEN, a ,citizen of the United States of America, residing at Detroit, in the county of Wayne and State of Michigan, have invented certainl new and usefullmprovements in Paving-Blocks, of which the following. is a specification, reference being had therein to the accompanying drawings. This invention relates to paving blocks, and more particularly to wood blocks laid upon a prepared foundation and maintained in place by a filling material, as tar, asphaltum or cement.

The primary object of my invention ,is to furnish paving blocks with novel spacing members, which can be placed in engagement with the blocks to properly space the same irrespective of the size of the blocks the spacing members compensating for size inequalities incurred by shrinkage and imperfect cutting of the block.

Another object of this invention is to provide paving blocks with spacing members adapted to prevent lateral displacement of a block relative to adjoining or confronting blocks, the spacing members having novel vertically displaced relative to each other,I

the interlocking means distributing a load upon any particular block to. adjoining blocks, and thereby preventing sunken or irregular portions in a pavement.

The above and other objects are attained by a mechanical construction that will be hereinafter specically described and then claimed, and reference will now be had to the drawing wherein- Figure 1 isa perspective view of a paving block in accordance with my invention; Fig. 2 is a side elevation of a plurality of blocks as laid upon a prepared foundation; Fig. 3 is a plan of the same; Fig. 4 is a detail sectional view illustrating a guard or shield for a spacing member of a block;

Fig. 5 is a detail sectional view illustrating spective view member.

, Inthe drawing, the reference numeral 1 denotes a rectangular Wood paving block whlch has one end Wall 2 thereof and one side Wall 3 thereofprovided With spacing members 4, said members being disposed to properly space the walls 2 and 3 relative to the Walls of adjoining blocks, as shown .in Fig. 3. The spacing members are preferably in the form of large hea-ded tacks which are drlven into the blocks a desired distance. For this purpose a suitable driving machine can be employed which has a predetermined stroke or blow that will simply drive the spacing members a known distance, consequently blocks that are not uniform in size will have the spacing members thereof compensate for the size inequalities, thus permitting of various sizes of blocks being evenly laid and properly spaced relative to adjoining blocks.

To prevent tar or other filling' material that is generally placed in the cracks or in-v terstices between the blocks from injuring the spacing members for repaving purposes, sleeves v5 can be members and supported by the heads thereof, as clearly shown in Fig. 4.

another.4 The interlocking members con-l nect a series of blocks whereby a load upon any particular block is distributed to the adjoining blocks, thus maintaining an even surface upon a pavement composed of blocks connected and laid in accordance with my invention. 4 f

As shown in Fig. 5, sleeves 8 may be used in connection with the interlocking members to shield the same from filling material placed between the blocks. Y

I am aware that pavingl blocks have been provided with ribs, tongues and grooves, dowel pins and other spacing and connecting members, but in each and every instance placed upon the spacing Patenteaot.12,1915. i

of a spacing and interlocking there is a sacrifice of lumber or material, creating a waste of little value besides neces sitating a prescribed system or method of laying the blocks. My invention not only permits of undersze or oversize blocks being used, but eliminates any waste of material.

The preferred embodiments of my invention have been illustrated, but it is to be understood that the structural elements are susceptible to such variations and modifications as fall within the scope of the appended claims.

What I claim is 1. A pavement composed of blocks, spaeing members carrled by walls of said blocks and abutting Walls of other blocks, and shields on said spacing members between said blocks.

2. A pavement composed of blocks, interlocking members y.connecting said blocks,

and shields on said interlocking members it between said blocks.

3. A pavement composed of blocks, and

block equalizing and spacing members 25 adapted to be forced in an end wall and side wall of each block and having heads abutting and bracing end and side walls of adjoining blocks, said members being forced in said blocks to a depth to compensate for 30 HARRY E. WARDEN. Witnesses:

ANNA M. DoRR, CHAs. W. STAUFFIGER. 

